import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '../components/Login.vue'
import Home from '../components/Home.vue'

Vue.use(VueRouter)

const routes = [
	{
		path:'/',
		redirect:'/login',
	},
	{
		path: '/login',
		name: 'Login',
		component: Login,
	},
	{
		path: '/home',
		component: Home,
	},
]

const router = new VueRouter({
  routes
})

router.beforeEach((to, from, next) => {
	/*
		to 将要访问的路径
		from 代表从哪个路径跳转而来
		next 放行函数
			next() 放行 next('/login') 强制跳转
	*/
	const tokenStr = window.sessionStorage.getItem('token')
	if(to.path === '/login'){
		if(!tokenStr) return next()
		else return next('/home')
	}
	if(!tokenStr) return next('/login')
	next()
})

export default router
